Yep. The whole "You will lead the people of Earth into the light, Kal-El" makes no sense coming from Jor-El. He knows nothing about his son's personality; Kal-El could just as easily grow up to be a tyrant as Earth's savior.

Maybe. But a responsible and loving father (on his "deathbed," essentially) would convey the highest aspirations he had for his son - and kinda skip over the more negative possibilities.